NDRG3 and neoplasm: As shown in Table 3, among the 81 PTC patients, the serum NDRG3 levels of PTC patients with different clinicopathological features were compared: 1Gender: 20 males and 61 females; 2Age: 63 patients aged <55 years and 18 patients aged ≥55 years; 3Degree of tumor invasion: 64 cases of PTC had unilateral invasion and 17 cases had bilateral invasion; 4Tumor length: 60 patients ≤10mm and 21 patients >10mm; 5Extrathyroidal extension: present in 28 patients and absent in 53 patients; 6Lymphatic metastasis: present in 15 patients and absent in 66 patients.